Country Life N-Acetyl Cysteine (NAC) 750 mg – Premium Liver…
Country LifeAmazon.com
$0.51/serving
$15.190°
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NAC
amino · 71 active deals
How much does NAC cost?
The best-value NAC right now is about $0.03 per dose — across the 65 we can price per dose the median is $0.162/dose, so shopping on cost-per-dose can cut your cost several-fold. Every NAC deal here is ranked by cost per dose — what you actually pay per serving, not the sticker price — because forms and absorption differ, so the cheapest bottle isn’t always the cheapest dose.
Prices checked · live from the Amazon US catalog.
Right now the best value across our full NAC catalog is at $0.03 per serving.
Median $0.162/servingCheapest quartile under $0.089across 65 tracked NAC deals
Compare:
What NAC does
N-acetylcysteine (NAC) is a modified amino acid. It is the mainstay of therapy for acetaminophen toxicity and is almost 100% effective when given within 8 hours post-ingestion, and it is also approved for conditions with abnormal, viscid, or inspissated mucous secretions such as pneumonia, bronchitis, cystic fibrosis, and tracheostomy care. The article notes it is studied/used off-label for acute hepatic failure, prevention of contrast-induced nephropathy, and topical treatment of keratoconjunctivitis sicca, plus experimental applications in psychiatric conditions (schizophrenia, bipolar disorder), gastrointestinal disorders, critical care, and conditions such as sickle cell disease. — per StatPearls (NCBI Bookshelf); not medical advice.
Forms & absorption
Available as a 20% concentration in 30 mL vials for IV use (requiring dilution because of high osmolarity, 2600 mOsmol/L) and as 10% and 20% vials for inhalation or oral use; acetaminophen overdose is treated via a 21-hour IV protocol or a 72-hour oral protocol. Time to peak is about 1 to 2 hours when nebulized and around 2 hours for the oral effervescent form, with a terminal half-life of about 5.6 hours after a single IV dose. — per StatPearls (NCBI Bookshelf).
NAC — safety & side effects
Oral NAC may cause nausea, vomiting, diarrhea, flatus, and gastroesophageal reflux, with vomiting in up to 33% of cases, while IV NAC can cause rate-related anaphylactoid reactions in up to 18% of patients (mild 6%, moderate 10%, severe including bronchospasm and hypotension rare at 1%). IV use may also cause a spurious increase in INR that normalizes when the infusion stops, a false-positive urine ketone result, and acute flushing/erythema; signs of toxicity include hemolysis, thrombocytopenia, metabolic acidosis, acute renal failure, and elevated bilirubin, and massive overdose has caused cerebral edema, seizures, and permanent brain injury. — per StatPearls (NCBI Bookshelf).
NAC — interactions & cautions
Coadministration with nitroglycerin may result in hypotension and nitroglycerin-induced headache. Bronchospasm more commonly occurs in patients with pre-existing reactive airway diseases like asthma, so NAC should be used cautiously in those with a history of bronchospasm or asthma (with a bronchodilator given 10 to 15 minutes before nebulization); in patients prone to fluid overload (eg, cardiomyopathy or congestive heart failure) the diluent fluid quantity must be appropriately titrated, and patients require monitoring for anaphylactoid reactions during IV administration. — per StatPearls (NCBI Bookshelf).
When and how to take NAC
NAC can be taken with or without food; taking it with food reduces the stomach upset some people notice. It is often taken once or twice daily.
NAC side effects
Occasional nausea or a sulphur smell; taking it with food usually settles the stomach.
General guidance on timing and absorption, not medical advice. Check with a clinician about your medications and conditions.
Dr Clark Store N-Acetyl-Cysteine (NAC) Supplement - 575 mg
Dr Clark StoreAmazon.com
$0.21/serving
$21.100°
BulkSupplements.com NAC Powder - N-Acetyl Cysteine 600mg
BulkSupplements.comAmazon.com
$0.03/serving
$28.970°
Horbäach NAC N-Acetyl Cysteine Supplement 1200mg | 250 Powder…
HorbäachAmazon.com
$0.08/serving
$19.990°
Now Foods Nac-Acetyl Cysteine 600mg, 250 Vcaps (500 (250X2))
NOW FoodsAmazon.com
$0.19/serving
$48.490°
Micro Ingredients NAC with NAD+ 1,000 mg Per Serving
Micro IngredientsAmazon.com
$0.06/serving
$13.990°
Now NAC, 1000 mg, 250 Tablets, Vegetarian and Vegan, Non-GMO
NOW FoodsAmazon.com
$0.16/serving
$40.400°
Micro Ingredients NAC Supplement 600mg Per Serving with NAD+…
Micro IngredientsAmazon.com
$0.07/serving
$19.990°
Amazing Formulas NAC (N-Acetyl-L-Cysteine) Supplement | 600 Mg…
Amazing NutritionAmazon.com
$0.07/serving
$17.990°
Now NAC 600 mg, 400 Capsules (Pack of 2), N-Acetyl Cysteine…
NOW FoodsAmazon.com
$0.09/serving
$74.950°
Best Naturals NAC - N Acetyl Cysteine 600 mg 250 Capsules - n…
Best NaturalsAmazon.com
$0.07/serving
$16.990°
Best Naturals NAC - N Acetyl Cysteine 600 mg 120 Capsules - n…
Best NaturalsAmazon.com
$0.08/serving
$9.990°
PROTOCOL FOR LIFE BALANCE NAC 1000 mg, Respiratory*, 120 Tabs
PROTOCOL FOR LIFE BALANCEAmazon.com
$0.31/serving
$37.000°
DEAL SUPPLEMENT NAC Supplement (N-Acetyl Cysteine) 1,000mg Per…
DEAL SUPPLEMENTAmazon.com
$0.08/serving
$19.990°
2 Pack NAC Supplement (N-Acetyl Cysteine) 1,000mg Serving…
DEAL SUPPLEMENTAmazon.com
$0.03/serving
$29.990°
BulkSupplements.com NAC 1000 mg Capsules - N-Acetyle Cysteine…
BulkSupplements.comAmazon.com
$0.12/serving
$21.960°
Brain Supplement Alpha GPC 300mg Phosphatidylserine Bacopa…
Clean NutraceuticalsAmazon.com
$0.42/serving
$24.950°
Now NAC 600 mg, 400 Capsules, N-Acetyl Cysteine with Selenium
NOW FoodsAmazon.com
$0.10/serving
$38.600°
NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium…
NOW FoodsAmazon.com
$0.13/serving
$12.700°
NEW AGE Resveratrol, Berberine, Grape Seed Extract, Quercetin…
NEW AGEAmazon.com
$0.29/serving
$34.950°
L-Methylfolate 15mg | 5-MTHF (Active B9) with Methyl B12, D3…
Natural ApproachAmazon.com
$0.40/serving
$23.950°
L-Methylfolate 15mg | 5-MTHF (Active B9) with Methyl B12, D3…
Natural ApproachAmazon.com
$0.60/serving
$17.950°
Vykee Nutrition NAC Capsules 600 mg N Acetyl L Cysteine…
Vykee NutritionAmazon.com
$0.19/serving
$22.990°
Pure Encapsulations NAC 900 mg - N-Acetyl Cysteine Amino Acid…
Pure EncapsulationsAmazon.com
$0.42/serving
$101.000°
NAC 600mg Non-GMO, Gluten Free,Organic NAC Supplement N-Acetyl…
SEAFLEXAmazon.com
$0.08/serving
$24.800°
NAC Supplement (N-Acetyl Cysteine) - 99%+ Purity Tested…
Double Wood SupplementsAmazon.com
$0.09/serving
$17.950°
Premier Research Labs Premier NAC - NAC Supplement N-Acetyl…
Premier Research LabsAmazon.com
$0.43/serving
$25.990°
Vital Nutrients NAC 600mg - N-Acetyl Cysteine - Vegan NAC…
Vital NutrientsAmazon.com
$0.32/serving
$31.990°
Life Extension N-Acetyl-L-Cysteine (NAC) 600mg, 150 Capsules
Life ExtensionAmazon.com
$0.18/serving
$27.690°
BulkSupplements.com N-Acetyl L-Cysteine Capsules - N-Acetyl…
BulkSupplements.comAmazon.com
$21.96/serving
$21.960°
MARYRUTH'S N-Acetyl Cysteine Capsules | 1000mg NAC N-Acetyl…
MaryRuth'sAmazon.com
$0.33/serving
$19.950°
NOW Foods Supplements, NAC (N-Acetyl-Cysteine) 1,000 mg, Free…
NOW FoodsAmazon.com
$0.16/serving
$19.390°
Pure Encapsulations NAC 600 mg - N-Acetyl Cysteine NAC…
Pure EncapsulationsAmazon.com
$0.32/serving
$115.500°
Pure Encapsulations NAC 900 mg - N-Acetyl Cysteine Amino Acid…
Pure EncapsulationsAmazon.com
$0.47/serving
$56.500°
NAC Supplement (N-Acetyl Cysteine) - 1000 mg-Antioxidant…
Truevantage NutritionAmazon.com
$0.17/serving
$19.990°
Pure Encapsulations NAC 600 mg - N-Acetyl Cysteine NAC…
Pure EncapsulationsAmazon.com
$0.43/serving
$38.500°
NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium…
NOW FoodsAmazon.com
$0.09/serving
$21.850°
Every NAC deal above is ranked by real cost per dose with no paid placement — see our and .
Independent testing
3 of 45 tracked NAC brands here are flagged as carrying independent third-party testing — a voluntary check of a product's identity, potency and contaminants by an outside lab. It's a quality signal, not a value or efficacy claim. Confirm any brand's current status on the official registries:
Testing status is self-reported by the brand or drawn from public certification and may change — always verify on the official registry before purchase.
NAC — dosage, safety & deals FAQ
- How much NAC is typically taken?
NAC is not an essential nutrient and has no ; the doses described are clinical protocols rather than general supplement amounts. For acetaminophen toxicity, an oral regimen uses a 140 mg/kg loading dose followed by 70 mg/kg every 4 hours for 17 more doses, and there is a weight-based IV protocol; as an inhaled mucolytic, 3-5 mL of a 20% solution (or 6-10 mL of a 10% solution) is described 3 or 4 times a day. — per StatPearls (NCBI Bookshelf); general information, not medical advice.
- What is NAC used for?
Per this page, NAC is FDA-approved as the mainstay of therapy for acetaminophen toxicity (reported as almost 100% effective if given within 8 hours post-ingestion) and as a mucolytic for conditions with abnormal or thick mucus such as pneumonia, bronchitis, and cystic fibrosis. It is also studied off-label for uses like acute hepatic failure, prevention of contrast-induced nephropathy, and psychiatric conditions, with some uses described as still experimental. — per StatPearls (NCBI Bookshelf); general information, not medical advice.
- Is NAC safe? What are the side effects?
Oral NAC may cause nausea, vomiting, diarrhea, flatus, and gastroesophageal reflux, with vomiting reported in up to 33% of cases. Intravenous NAC can cause rate-related anaphylactoid reactions in up to 18% of patients (mostly mild or moderate, with severe reactions like bronchospasm and hypotension rare at about 1%); if such a reaction occurs the page states NAC should be stopped immediately and the patient treated with an antihistamine and IV fluids. — per StatPearls (NCBI Bookshelf); general information, not medical advice.
- Does NAC interact with any medications?
NAC guides
Related amino acids
References & sources
- N-Acetylcysteine — StatPearls, NCBI Bookshelf
- USP Verified product participants — U.S. Pharmacopeia
- NSF certified products — NSF
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.